Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2026	Dec. 31, 2025
Current assets:
Cash	$ 2,546,000	$ 4,857,000
Accounts receivable	0	6,000
Inventory, net	49,000	52,000
Prepaid and other current assets	2,495,000	2,110,000
Assets held for sale (Note 3)	18,182,000	21,490,000
Total current assets	23,272,000	28,515,000
Property and equipment, net	0	661,000
Other non-current assets	255,000	389,000
Total assets	23,527,000	29,565,000
Current liabilities:
Credit facility	0	4,259,000
Accounts payable	2,794,000	355,000
Seller notes	38,000	368,000
Accrued and other current liabilities	3,919,000	5,336,000
Liabilities held for sale (Note 3)	4,161,000	3,812,000
Total current liabilities	10,912,000	14,130,000
Other liabilities	0	225,000
Total liabilities	10,912,000	14,355,000
Commitments and contingencies (Note 12)
Stockholders' equity:
Preferred stock, $0.0001 par value, 10,000,000 shares authorized, 1,750,000 and no shares issued and outstanding at June 30, 2026 and December 31, 2025, respectively	0	0
Common stock, $0.0001 par value, 500,000,000 shares authorized and 10,879,410 and 10,027,046 shares outstanding at June 30, 2026 and December 31, 2025, respectively	9,000	9,000
Additional paid-in capital	750,500,000	746,414,000
Accumulated deficit	(737,284,000)	(730,661,000)
Accumulated other comprehensive loss	(610,000)	(552,000)
Total stockholders’ equity	12,615,000	15,210,000
Total liabilities and stockholders' equity	$ 23,527,000	$ 29,565,000

Represents the amount of accrued expenses and other liabilities classified as current.

No definition available.

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Namespace Prefix:	ater_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).